Brush cylinder

Abstract

A cutting arrangement comprises a blade shaft ( 32 ) which is mounted for drivable rotation about a blade-shaft axis of rotation ( 31 ) and which has at least one circular blade ( 34 ); and a brush roll ( 16 ) which is disposed opposite the blade shaft ( 32 ) and mounted for rotation about a brush-roll axis of rotation ( 15 ); the brush roll ( 16 ) possessing shells ( 37 ) in the cross-sectional shape of a segment of a circle which are disposed on a roll core ( 17 ) and which have an outside ( 39 ) and an inside ( 40 ) that is turned towards the roll core ( 17 ), bristles that stand out from the outside ( 39 ), torque-transmission components ( 44, 45, 46 ) for transmitting torque from the roll core ( 17 ) to the shells ( 37 ), and fastening components ( 49, 51 ) for fixing the shells ( 37 ) to the roll core ( 17 ).

The invention claimed is: 
     
       1. A cutting arrangement which is disposed on a path of travel of a web of corrugated board that is continuously produced by a corrugating machine, the cutting arrangement comprising:
 a. a blade shaft which is mounted on a blade-shaft axis of rotation for drivable rotation and which comprises at least one circular blade thereon; and 
 b. a brush roll, which is disposed opposite to the blade shaft and mounted for rotation about an axis of rotation, for supporting the web of corrugated board which passes between the circular blade and the brush roll when the web of corrugated board is cut by the at least one circular blade; 
 c. the brush roll comprising shells which are disposed on a roll core and have a cross-sectional shape of a segment of a circle, wherein each shell has
 i. an outside and an inside, the inside faces towards the roll core; 
 ii. bristles which stand out from the outside; 
 iii. torque-transmission means for transmitting torque from the roll core to the shells; and 
 iv. fastening means for fixing the shells to the roll core; 
 
 d. wherein threaded holes are radially provided in the roll core and on the inside of the shells, respectively accommodating the fastening means for non-rotary connection of the shells with the roll core; 
 e. wherein the fastening means comprises a fastening pin, and the fastening pin comprises two threaded portions of different pitches; 
 f. wherein a first of the threaded portions of the fastening pin is engaged with the threaded hole on the shell, and a second of the threaded portions of the fastening pin is engaged with the threaded hole on the roll core, and the second threaded portion of the fastening pin has a larger pitch than the pitch of the first threaded portion of the fastening pin; and 
 g. wherein the second threaded portion of the fastening pin is of a larger diameter than the first threaded portion of the fastening pin. 
 
     
     
       2. A cutting arrangement according to  claim 1 , wherein the shells are half-shells. 
     
     
       3. A cutting arrangement according to  claim 1 , wherein the shells form a closed brush sleeve on the roll core. 
     
     
       4. A cutting arrangement according to  claim 1 , wherein annular ribs are provided on the roll core, and the annular ribs project radially at least along part of a periphery of the roll core. 
     
     
       5. A cutting arrangement according to  claim 4 , wherein ring grooves are provided on the inside of the shells, and the ring grooves cooperate with the ribs for at least one of fixing the shells axially and fixing the shells tangentially. 
     
     
       6. A cutting arrangement according to  claim 4 , wherein ring grooves are provided on the inside of the shells, and the ring grooves cooperate with the ribs for fixing the shells tangentially. 
     
     
       7. A cutting arrangement according to  claim 1 , wherein said shells comprises a first shell and a second shell, and wherein the first shell comprises a first fastening means and the second shell comprises a second fastening means for connection of the first shell with the second shell on the roll core. 
     
     
       8. A cutting arrangement according to  claim 1 , wherein in the vicinity of the axial or tangential ends of the shells, the bristles incline towards the respective end, in particular combining with a radius to make an angle of b>0°. 
     
     
       9. A cutting arrangement according to  claim 1 , wherein two adjacent ones of the shells interengage with one another by way of projections in the vicinity of their respective tangential ends. 
     
     
       10. A cutting arrangement according to  claim 1 , wherein the shells are disposed adjacent to one another with gaps between each two adjacent ones of the shells, and the bristles extend outwardly at angles at least in areas adjacent to the gaps to cover the gaps between adjacent shells. 
     
     
       11. A cutting arrangement according to  claim 1 , wherein said shells of the brush roll comprise a plurality shells disposed adjacent to one another in an axial direction along the roll core. 
     
     
       12. A cutting arrangement according to  claim 11 , wherein adjacent ones of said plurality of shells disposed adjacent to one another in the axial direction are separated by a gap therebetween, and the bristles extend outwardly at angles at least in areas adjacent to the gaps to cover the gaps between the adjacent shells. 
     
     
       13. A shell for being fixed to a roll core, the shell comprising:
 a. a basic structure having a cross-sectional shape of a segment of a circle, said basic structure having a substantially convex outside and a substantially concave inside; 
 b. bristles which project outwards from the outside; 
 c. torque-transmission means for transmitting torque from the roll core to the basic structure; 
 d. fastening means for fixing the basic structure to the roll core, wherein the fastening means is a threaded pin having an external thread; 
 e. receiving means for receiving said threaded pin, wherein the receiving means comprises a through hole having an internal thread for receiving the threaded pin and wherein the through hole extends radially concerning the circle; 
 f. wherein said external thread comprises distal and proximal thread portions such that for fastening to said roll core, said distal thread portion is engaged with said internal thread of said through hole and said proximal thread portion projects radially inwards concerning the circle from said inside of the basic structure for engaging said roll core; and 
 g. wherein the diameter of the proximal thread portion is larger than the diameter of the distal thread portion. 
 
     
     
       14. A shell according to  claim 13 , wherein the through hole is arranged centrally between two phases of the shell. 
     
     
       15. A shell according to  claim 13 , wherein the through hole is arranged centrally in the axial direction of the shell. 
     
     
       16. A shell according to  claim 13 , wherein the shell comprises ring grooves provided on the inside of the shell for fixing the shell in an axial direction. 
     
     
       17. A shell according to  claim 16 , wherein each of the ring grooves comprises at least one axial edge oriented transversally to the circle. 
     
     
       18. A shell according to  claim 13 , wherein the shell is made of plastic material. 
     
     
       19. A shell according to  claim 13 , wherein the pitch of the proximal thread portion is larger than the pitch of the distal thread portion. 
     
     
       20. A cutting arrangement which is disposed on a path of travel of a web of corrugated board that is continuously produced by a corrugating machine, the cutting arrangement comprising:
 a. a blade shaft which is mounted on a blade-shaft axis of rotation for drivable rotation and which comprises at least one circular blade thereon; and 
 b. a brush roll, which is disposed opposite to the blade shaft and mounted for rotation about an axis of rotation, for supporting the web of corrugated board which passes between the circular blade and the brush roll when the web of corrugated board is cut by the at least one circular blade; 
 c. the brush roll comprising shells which are disposed on and surround a roll core and have a cross-sectional shape of a segment of a circle, wherein each shell has
 i. an outside and an inside, the inside faces towards the roll core; 
 ii. bristles which stand out from the outside; 
 iii. torque-transmission means for transmitting torque from the roll core to the shells; and 
 iv. fastening means for fixing the shells to the roll core; 
 
 d. wherein threaded holes are radially provided in the roll core and on the inside of the shells, respectively accommodating the fastening means for non-rotary connection of the shells with the roll core; 
 e. wherein the fastening means comprises a fastening pin, and the fastening pin comprises two threaded portions of different pitches; 
 f. wherein said fastening means fixes the shells directly to the roll core; 
 g. wherein a first of the threaded portions of the fastening pin is engaged with the threaded hole on the shell, and a second of the threaded portions of the fastening pin is engaged with the threaded hole on the roll core, and the second threaded portion of the fastening pin has a larger pitch than the pitch of the first threaded portion of the fastening pin; and 
 h. wherein the second threaded portion of the fastening pin is of a larger diameter than the first threaded portion of the fastening pin.